A person who witnessed the incident but asked for anonymity because they were not authorized to speak publicly said Minaj was finishing a conversation with someone when Cardi B tried to attack her, but Minaj’s security guards intervened.

Video from the Harper’s Bazaar Icons party circulating on social media showed Cardi B lunging towards someone and being held back. Another video showed the rapper being escorted out of the event by security.

Cardi B, wearing a voluminous red Dolce & Gabanna gown, was seen leaving the party with what appeared to be a bump on her head. She was barefoot.

She and Minaj have been rap rivals since Cardi B began achieving huge success over the last year.